HDMI to LCD monitor not working, help?

I just bought a micro HDMI to HDMI cable to connect my RAZR to my Asus monitor. I plugged it to my monitor and the phone, went to overscan and played around (even though I don't know what it actually does).

But the monitor was black the entire time. I don't think it even read my phone being plugged in. From what I read so far, it seems like I need to enable "mirror mode" on my monitor's end, but I don't see this option on my monitor or my phone.

If anyone's solved this or knows how to fix it, I'd greatly appreciate it. Thank you